Gasket



Dec. 2l, 1937. M. J, BROWN v 2,102,673

GASKET Filed Sept. 23, 1936 nlll l l ml .f %/////m|| l -f f5' "'"m' @u I ATTORNEY V UNITED. STATES PATENT OFFICE t GASKET v ,Mortimer J. Brown, Niagara Falls, N. Y.

Application September 23, 1936,V Serial No. 102,063 I s claims. (o1. 28sn "I'hisfinvention relates; to gaskets of the type since the iins bend toward the interioror axis of employed for sealing siphon bottles and other the gasket and bottle, the pressure of the carbonpressure vessels as Well as for a variety of other ated liquid or other compressed fluid in the bottle purposes. p will always tend to force the fins against the con- 5 The object of the invention is toprovide a tiguous surfaces of the siphon head and bottle, 5'

simple inexpensive gasket` which: `will afford an thereby increasing the tightness of the seal. effective seal withoutexcessive compression and These and other features and advantages of the is so constructedthat'the pressure of fluid within invention, including various modifications of the the sealed body will automatically increase the speciiicstructures referred tok above for purposes l0 sealing effect ofthe gasket. of illustration, will be described in connection '10 l"A simple illustration of a gasket embodying m with the accompanying drawing, in which: g invention is one which I use for sealing screw-top v Fig. 1 is a longitudinal section through a siphon siphon'bottles, of the type disclosed in my Patent bottle and head employing a gasket constructed #2,055,466 of September 29, 1936. Thesebottles in accordance with the invention; A l5 maybe used `by housewives and other consumers Fig..2 is an enlarged fragmentary view showing i5,

' whoA make their own carbonated beverages Vand I the shape of the gasket before being compressed find it impractical to use an ordinary flat faced between the bottle and head;

gasket toseal the junctureiof such a bottle with its Fig. 3 is a plan view of the gasket as viewed siphon-head'because itis impossible tov compressa from the ,bottoml of Figs. l' and 2; Y atlgasket sufficiently toimake it gas tight with- Fig. 4 is a plan view of the gasket as viewed 2'0 out av very diicult twist ofv the wrist.` My imfrom the top of Figs. 1 and 2; and

proved gasket,'however, is so constructed that it Fig. 5 is a fragmentary sectional view through is absolutely tight when only slightly compressed a gasket of slightly modined construction. V-

and such pressure may easily be applied by women f In the drawing, l is a siphon Vhead or top carryandrchildren Who have little'strength'in the wrist. 'ing a Siphon tube and having an annular portion "25 `In its preferred formV my lgasketcomprises a Zwhich` is internally threaded so that it may be body of deformable. relatively lsoft elastic mate-` screwed on the neck 3 of a vessel or bottled.A rl'his .rial Such as rubber having a continuous nof Siphon head is similar to'that disclosed in my Wedge shaped cross-section on each side with the abovelmentioned Patent #2,055,486 and is shown f5 apexes of the wedges protrudingso as to engage merely for purposes of illustration since my'irnthe surfaces to be sealed, these surfaces, in the proved gasket may be used equally Weli in numercase of la screw-top Siphon bottle, being the con-V` ous other situations. tiguous flat surfaces of the Siphon head and bot- The gasket 5 forming the subject 0f the present tlef An important feature of the invention reinvention comprises a body of deformable, relaf r`sid'es'in forming the ns of the gasket in such` a tively soft elastic material such as rubber, and, in Way that they will bend or dub over toward the the'form shown in Figs-l to 4, has a depending inner annulus of the gasket when compressed, and annular flange 6 fOr the DUIDOSG Of centering the I preferably accomplish this by'making the inner gasket on the mouth of the bottle if.. c faces ofthe'iinsl substantially perpendicular rto 1n the form illustrated, the upper and lower clined with respect to such plane. outwardly from said sides, preferably in align- Viewing my gasket as it appears when seated 0nment with each other, are the continuous annular lthe neck of a siphon bottle, the inner faces of the fmS 9 Vand l0 asbest shown inFigS.` l and2- 'The Wedgewshaped fins will be substantially parallel to fins 9 and lil are of wedge-shaped cross-section 45 the axis of the bottle and Siphon head, while the and have their sharp pointed apexes projecting 45 Y outer faces of these fins will beinclined at an outwardly from the ygasket so as to engage the angle Yto such axis. Now, when the siphon head contiguous parallel surfaces of the siphon head I is screwed down on the bottle, the pressure on and bottle 4.

the wedge shaped ns will be exerted first against According to a feature of the invention the 50 the pointed apexes and then progressively against wedge shaped ns 9 and l0 are formed so that 50 the inclined outer faces of the fins with the result they will bend toward the interior when comthat the fins will be bent over toward the interior pressed between the contiguous surfaces of the of the bottle. Even a very slight pressure on the Siphon head l and bottle 4. This is preferably gasket is sufficient to bend the fins into tight sealaccomplished by making the inner faces I2 of the ,55 ing contact with the surfaces to besealed, and, Wedges substantially perpendicular to the sides 1 55 the plane of the Agasket andthe outer faces insides l and 8 of the gasket are flat, and projecting and bottle 4, and by inclining the outer faces I3 of said wedges toward the outer periphery of the gasket as best shown in Fig. 2.

When the gasket is compressed by the application of pressure in the direction of the axis of the Siphon head l and bottle 4, as by screwing the head on the bottle, the annular ns 9 andV l0 of the gasket are bent toward the interior of the bottle as illustrated in Fig. 1. When the fins 9 and I0 are thus compressed it will be evident that pressure from within the bottle 4, that is, the pressure of the carbonated liquid or other compressed fluid in the bottle, forces the fins against the contiguous surfaces of the siphon head and bottle and thereby increases the tightness of the seal.

An important advantage of my gasket is that it is practically self-sealing, in that if a very moderate contact is established it is tightto gas and liquids. Heretofore, with ordinary gaskets not provided with sealing fins, it has been necessary to exert a very considerable force in applying the heads to siphon bottles in order to compress the gasket sufliciently to obtain even a reasonably tight seal. My improvedgasket not only insures a much tighter seal than any other gasket with which I am familiar, but it also requires so little pressure that it can easily be fastened in place by alwoman o-r child.

In constructing my gasket I preferv to provide only two fins 9 and Il), one on each side, and I prefer to arrange these two fins as nearly opposite, that is of theV same radius, as possible. It might seem thatrsince one fln on each side of the gasket provides a highly effective seal, two concentric fins should be better, but in practice I find that this is not the case. One object of my invention is'tol provide a gasket which will afford a tight seal with the least possible pressure for compression; and if there is a given amount of pressure available for compression, it would be divided equally between two ns, if there were two fins on a side or between three if there were three on a side; hence it is better to provide only one n on each side of the gasket. A still more important reason for having only one n on each side of the gasket is that each fin acts like a self-closing valve, as explained above, and if there were twoconcentric ns on a side, each getting only half the pressure which would be applied to one '.n, and if the rst fin were to leak it would then have high pressure gas on both Vsides and would not act as a self-closing valve. Each iin therefore provides the most effective seal when it gets the full pressure available for compression, and has the maximum diierential of gas pressure from one side of the iin to the other. f

` It will be evident that the depending ange 6 of my gasket, which is used for centering purposes in Figs. l to 4, may be omitted when dewithout such centering fiange. In constructing certain types of pressurevessels it may be desired to fasten one side of the gasket permanently to one of the sealing surfaces of the vessel, for example to clamp or otherwise permanently fasten the lower side 8 of the gasket 5 to the neck of the bottle 4, and in such case the gasket would require only one sealing fin which in this example would be the n 9 on the exposed side 'l of the gasket. My invention embraces such modication and it will also be evident that various other changes may be made in the details of construction herein shown and described without departing from the scope and spirit of the invention as defined in the appended claims.

The invention claimed is:

1. A gasket comprising a readily deformable elastic body having an annular iin of wedgeshaped cross-section on each side thereof with the apexes of said wedges protruding axially from the gasket so as to constitute the sole engagement with the surfaces to be sealed, said (wedge-shaped ns being in alignment with each other and having their inner faces substantially parallel to the axis of the gasket and their outer faces inclined at an angle to said axis such that said outer faces: remain out of engagement with the surfaces to be sealed except at said apexes when said fins are caused to bend toward the axis of the gasket by application of normal sealing pressure to said apexes. l

V2. A gasket comprising a readily deformable elastic body having an annular fin of wedgeshaped cross-section on at least one side thereof with the apex of said wedge protruding axially from the gasket so as to constitute the 'sole engagement with the surface to be sealed, said wedge-shaped fin having its inner face substantially parallel to the axis of the gasket and its outer face inclined at an angle to said-axis such that said outer face remains out of engagement with the surface to be sealed except at said apex when said fin is caused to bend toward the axis of the gasket by application of normal sealing pressure to said apex.

K 3. In a vessel adapted to contain fluid under pressure and having a removable top, said vessel and said top having parallel surfaces to be sealed, a gasket for sealing said surfaces, said gasket comprising a readily deformable elastic body having an annular n of wedge-shaped cross-section on yeach side thereof, with the apexes of said wedges protruding axially from the gasket so as to constitute the sole engagement with said surfaces, said wedge-shaped fins being in alignment with each other and having their inner faces substantially parallel to the axis of the gasket and their outer faces inclined at an angle to saidaxis such that said outer faces remain out of engagement with said surfaces except at said apexes when said fins are caused to bend toward the axis of the gasket by application of normal sealing pressure to said apexes.

` MORTIMER J. BROWN. 

